AN7708SP Equivalent & Substitute Parts

Part Overview

The AN7708SP is a linear voltage regulator IC manufactured by Panasonic Electronic Components, designed for positive fixed 8V output applications with 1.2A current capacity. This Surface Mount device in TO-252-3 DPAK packaging is classified as obsolete, making identification of functionally equivalent alternatives essential for ongoing production and maintenance applications.

Substiute Parts

AN7708SP

Panasonic Electronic ComponentsIn Stock: 2484AN7708SP Datasheet

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LF80CDT-TR

STMicroelectronicsIn Stock: 20310LF80CDT-TR Datasheet

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Key Parameters

Substitute Part Grouping Explanation

Substitution of the AN7708SP is determined by the following critical parameters:

• Fixed output voltage of 8V
• Positive output configuration
• Surface Mount DPAK packaging (TO-252-3, SC-63)
• Linear regulator topology
• Protection features including Over Current and Over Temperature

The LF80CDT-TR from STMicroelectronics qualifies as a functional substitute based on matching output voltage (8V fixed), output configuration (positive), package type (DPAK), and protection feature set. Both devices operate as single-output linear voltage regulators in identical physical packages suitable for direct PCB replacement.

Parameter Comparison

Engineering Selection Recommendations

The LF80CDT-TR is an active product from STMicroelectronics with ROHS3 compliance, addressing the obsolescence status of the AN7708SP. The substitute maintains identical output voltage specification (8V fixed) and package form factor (DPAK), enabling direct PCB replacement in most applications.

Design consideration: The LF80CDT-TR output current rating of 500mA is lower than the AN7708SP specification of 1.2A. Applications requiring the full 1.2A output current capacity must evaluate whether the 500mA limit is acceptable for the intended circuit function. The LF80CDT-TR maximum input voltage of 16V is also lower than the AN7708SP maximum of 19V, requiring verification that input supply voltages remain within the 16V limit.

The LF80CDT-TR offers improved quiescent current performance (1.5 mA versus 5 mA) and extended operating temperature range (-40°C to 125°C versus 25°C to 125°C), providing additional design flexibility for temperature-sensitive applications.

Frequently Asked Questions (FAQ)

Q: Can the LF80CDT-TR directly replace the AN7708SP on existing PCBs?

A: Yes, the LF80CDT-TR uses identical DPAK packaging (TO-252-3, SC-63) and pin configuration, allowing direct PCB replacement without layout modifications. Pin-to-pin compatibility is maintained.

Q: What are the key differences between these two regulators?

A: The primary differences are output current capacity (AN7708SP: 1.2A versus LF80CDT-TR: 500mA), maximum input voltage (AN7708SP: 19V versus LF80CDT-TR: 16V), and product status (AN7708SP: Obsolete versus LF80CDT-TR: Active). Both maintain the same 8V fixed output voltage and DPAK package.

Q: Is the LF80CDT-TR suitable for applications requiring 1.2A output current?

A: No. The LF80CDT-TR maximum output current is 500mA. Applications requiring 1.2A output current must either use the original AN7708SP if available from inventory, or select an alternative 8V regulator with 1.2A or higher current rating.

Q: What is the impact of the lower maximum input voltage on the LF80CDT-TR?

A: The LF80CDT-TR accepts input voltages up to 16V maximum, compared to 19V for the AN7708SP. Circuits with input supplies exceeding 16V cannot use the LF80CDT-TR. Verify that your input supply voltage remains below 16V before substitution.

Q: Does the LF80CDT-TR meet RoHS requirements?

A: Yes, the LF80CDT-TR is ROHS3 compliant, whereas the AN7708SP is RoHS non-compliant. This makes the LF80CDT-TR suitable for applications with RoHS compliance requirements.

Q: Are there differences in protection features between these regulators?

A: The AN7708SP includes Over Current, Over Temperature, and Short Circuit protection. The LF80CDT-TR includes Over Current and Over Temperature protection. Short Circuit protection is not listed for the LF80CDT-TR.